US2795244A - Woven textile fabrics - Google Patents

Description

June 11, 1957 D. w. SHIMWELL 2,795,244

WOVEN TEXTILE FABRICS Original Fil d Aug. 2, i954 .Zzpventon 512/6122 we L6 WOVEN TEXTILE FABRICS Derrick W. Shimwell, Ballamoar Castle, Jar-by, isle-of- Man, assignor to Weaving Research & Textile Commission Agents Limited, Jurby, lsle of-Man, a British company Original application August 2, 1954, Serial No. 447,282. Divided and this application January 14, 1955, Serial N 0. 481,936

2 Claims. (Cl. 139-383) This application is a division of my copending application Serial No. 447,282, filed August 2, 1954.

In the production of woven textile fabrics in looms using stationary weft supplies and arms, needles or other devices for transferring the Weft into the warp shed, and where only a single weft thread is laid in the clothat each pick, it has been found necessary to turn-in the weft at the end of each or of each alternate pick in order to form the cloth selvedge. One method gives 100% and the other 50% more weft in the selvedge, but although as a result the selvedges are more robust and better for sewing together, as for example when two selvedges of the fabric are sewn together for the manufacture of bags, the weaving process is made more difficult, the cloth is diflicult to roll up and there are disadvantages in finishing treatments. This is particularly the case where the yarns consist of certain bast fibres, such as jute, and long leaf fibres such as sisal. Due to the hardness of these fibres, the selvedges would be liable to split during calendering and like processing.

The object of the present invention is to provide an improved woven textile fabric having more weft in the selvedge than in the body of the cloth, which results in more robust selvedges, but without the disadvantages before referred to of the usual fabrics woven with thickened selvedges.

The invention comprises a woven fabric as aforesaid in which the weft threads inserted in alternation from opposite sides of the fabric are looped back in the opposite selvedge, so producing a U form of weft, one end of each loop having a turned back end at the selvedge, the looped portions of the weft threads inserted from one side of the fabric passing around the turned back ends of the other weft threads, and the plain ends of the latter (that is the ends without turned back portions) coming between adjacent looped portions, whilst the looped portions of the weft threads inserted from the other side of the fabric pass round the plain ends of the other weft threads, the turned back ends of the latter coming between adjacent loops.

The invention further comprises a woven fabric as aforesaid in which in the main body of the fabric, the warp threads are shed after each weft pick, whilst in the selvedge the warp threads are shed after each alternate weft pick, the turned back ends being bound in the fabric in the same warp shed as the weft ends to which they are attached.

In application, Serial No. 447,282 filed August 2, 1954 is shown and described a weaving loom for producing fabn'cs, one of such fabrics being disclosed herein.

2,795,244 Patented June ll, 1957 The accompanying drawing shows our improved fabric which has 25% more weft in the selvedges than in the main body of the fabric. a indicates weft and b warp threads. The latter are shown only at and towards the selvedges.

It will be noted that each weft thread a is of U form, being looped back at f in the opposite selvedge to that containing the ends of the loop. One end h of each loop has a turned back length of yarn g which is bound in the fabric in the same warp shed as the end It. It will be noted that at the left hand selvedge, the weft ends h with the turned back portions g come within the looped portion f of weft threads, whilst at the right hand selvedge, the plain ends i of the weft threads come within the looped portions 1. The plain ends 1' of weft threads at the left hand selvedge come between adjacent looped portions 1; the ends it with turned back portions g at the right hand selvedge come between adjacent looped portions f. The four Warp threads nearest to each selvedge are shed or crossed over at alternate weft picks but the other warp threads are shed or crossed over after each weft pick. As before stated the turned back end portions g are bound in the fabric in the same warp shed as the ends I: to which they are attached.

The fabric may be produced in the loom described and claimed inmy copending application, Serial No. 447,282.

What I claim is:

1. A Woven textile fabric including warp threads and U-shaped weft threads inserted alternately from opposite sides of the fabric, each weft thread having a turned back end located in the selvedge with the turned back ends of the threads inserted from one side of the fabric being located within the loops of the weft threads inserted from the opposite side of the fabric and the turned back ends of the weft threads inserted from said opposite side being located between the adjacent loops of the threads inserted from said one side.

2. A woven fabric including warp threads and weft threads, the Weft threads being inserted alternately from opposite sides of the fabric and looped back into the selvedge thereby producing a U-form of weft, each weft thread having a plain end and a turned back end, with the turned back end located in the selvedge, the looped portions of the weft threads inserted from one side of the fabric passing around the turned back ends of the weft threads inserted, from the oher side of the fabric, with the plain ends of the later being located between adjacent looped portions, while the looped portions of the weft threads inserted from the other side of the fabric pass around the plain ends of the other weft threads and the turned back ends of the latter weft threads being located between adjacent loops.

References Cited in the file of this patent UNITED STATES PATENTS 361,360 Hunt Apr. 19, 1887 1,948,051 Rossmann Feb. 20, 1934 2,027,806 Bird Jan. 14, 1936 2,034,487 Rossmann Mar. 17, 1936 FOREIGN PATENTS 677,255 Germany June 22, 1939

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